Frostbite occurs when the body's tissues freeze deeply in the cold.18 Ice crystals that form in the tissues cause damage to the cells. This is the opposite of a burn, but it does almost identical damage to the skin.
Treating frostbite19 is a delicate procedure of gradual warming. If at all possible, this should be done by professionals at a medical facility.
First, get out of the cold. Small areas of minor frostbite20 may be rewarmed by skin-to-skin contact, but avoid using any heat sources or hot packs.
If you can't make it to a medical facility, use immersion of the affected area in warm water (98 to 105 F) for 20 to 30 minutes to rewarm it. Do not rub the affected area or use heat sources..

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